钢筋混凝土电化学除氯技术研究现状

电化学除氯(ECE)技术通过在外加阳极和钢筋阴极之间施加电压来排除氯离子使钢筋重新恢复钝化,从而达到保护钢筋混凝土的目的。为了进一步了解电化学除氯技术的发展,本文综述了近年来国内外钢筋混凝土电化学除氯技术的研究进展,阐述了电化学除氯原理,总结了电化学除氯的影响因素,系统地介绍了电化学除氯对钢筋混凝土粘结力、宏观性能和微观结构的影响,分析了目前电化学除氯存在的问题并提出了未来的研究方向,以期电化学除氯技术在提高滨海混凝土结构耐久性方面发挥更好地作用。

Research Status of Electrochemical Chloride Extraction Technology ofReinforced Concrete

The electrochemical chloride extraction (ECE) technology evacuates chloride ions by applying a constant voltage between the external anode and the cathode of reinforcing bars,which aims to recover the passivation of the reinforcements and also protecting the reinforced concrete.To have a better understanding of ECE technology,this paper has summarized the advanced achievements on the topic of ECE by researchers worldwide,meanwhile,the impact factors are also investigated.Moreover,the effects of ECE technology on the bonding strength,macroscopic performance and microstructure of reinforced concrete are comprehensively introduced.Finally,the remaining drawbacks of ECE technology are put forward and the prospect of future researches is also proposed.It is expected that electrochemical dechlorination technology will play a better role in improving the durability of coastal concrete structures.